EP3481442A1 - Dispositif de nébulisation d'un produit liquide - Google Patents
Dispositif de nébulisation d'un produit liquideInfo
- Publication number
- EP3481442A1 EP3481442A1 EP17748528.1A EP17748528A EP3481442A1 EP 3481442 A1 EP3481442 A1 EP 3481442A1 EP 17748528 A EP17748528 A EP 17748528A EP 3481442 A1 EP3481442 A1 EP 3481442A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- air
- flow
- ultrasonic head
- sonotrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012263 liquid product Substances 0.000 title description 4
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 40
- 239000002245 particle Substances 0.000 claims abstract description 31
- 239000000645 desinfectant Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 23
- 238000009423 ventilation Methods 0.000 claims description 23
- 239000003595 mist Substances 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 15
- 230000000249 desinfective effect Effects 0.000 claims description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Natural products CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 230000005465 channeling Effects 0.000 claims description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N hydrogen peroxide Substances OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 5
- 230000002572 peristaltic effect Effects 0.000 claims description 5
- KFSLWBXXFJQRDL-UHFFFAOYSA-N peroxyacetic acid Substances CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 35
- 239000000047 product Substances 0.000 description 34
- 239000007921 spray Substances 0.000 description 22
- 238000002663 nebulization Methods 0.000 description 10
- 238000002604 ultrasonography Methods 0.000 description 7
- 235000013305 food Nutrition 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 5
- 238000004064 recycling Methods 0.000 description 4
- 239000002537 cosmetic Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000012678 infectious agent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000443 aerosol Substances 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000006199 nebulizer Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000011802 pulverized particle Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
- B05B17/063—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn having an internal channel for supplying the liquid or other fluent material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/22—Phase substances, e.g. smokes, aerosols or sprayed or atomised substances
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0075—Nozzle arrangements in gas streams
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/20—Targets to be treated
- A61L2202/25—Rooms in buildings, passenger compartments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/10—Apparatus features
- A61L2209/13—Dispensing or storing means for active compounds
- A61L2209/132—Piezo or ultrasonic elements for dispensing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/10—Apparatus features
- A61L2209/13—Dispensing or storing means for active compounds
- A61L2209/134—Distributing means, e.g. baffles, valves, manifolds, nozzles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/20—Method-related aspects
- A61L2209/21—Use of chemical compounds for treating air or the like
- A61L2209/211—Use of hydrogen peroxide, liquid and vaporous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0653—Details
- B05B17/0661—Transducer materials
Definitions
- the invention relates to a device for nebulizing a liquid product, suitable for the disinfection of premises by air, and a method for disinfecting a room by air operated by such a device.
- the field of the invention is that of disinfection by air (acronym D.V.A), in particular local, and more nebulizing devices used for the implementation of such disinfections.
- the invention can also be used for the disinfection by air of a compartment or a passenger compartment of a vehicle, including a rescue vehicle such as an ambulance.
- infectious agents such as bacteria, viruses and fungi are suspended in the air, but also present on the objects and walls of a room. Infectious agents suspended in air can settle on objects and walls of the room and those already present on objects and walls can again be suspended in the atmosphere.
- the nebulization technique commonly used to spray a disinfectant liquid to the desired particle size is based on the use of a nozzle system operating on the principle of a venturi and requiring a source of compressed air: the devices nebulizing using this technique thus require the presence of an air compressor which is a very expensive component of the device, energy and noisy, and heavy.
- economically available compressors for this application failure to use electric brush motors, which are important wear components.
- an air compressor is an equipment generating significant electromagnetic disturbances, which is to be avoided especially in hospital.
- FR 2972357 is an example of such a device.
- misting fountain There is still literature in the field of disinfection by air nebulization techniques commonly called "misting fountain".
- This misting technique consists in directly submitting a liquid contained in a reservoir (open) to ultrasonic waves, which generates cavitations and thus a fog on the surface of the liquid in this tank: the disinfecting mist is driven by a flow of water. air generated by a ventilation system.
- the documents FR 2655279 or FR 2941378 are examples of such nebulizing devices using this technique of generating disinfecting mist.
- the device of document US Pat. No. 5,224,651 is still known from the field of outdoor spraying and which combines: a fan, electrical, coaxial, creating an air flow between the walls of an outer nozzle and an inner nozzle, coaxial with each other, guiding the flow of air drawn between the concentric walls of the nozzles,
- an ultrasonic nozzle spray device arranged coaxially with the nozzles, housed in the inner nozzle and spraying the liquid through an ultra sonic nozzle in the axial direction of the nozzles,
- an air compressor whose air inlet encircles the outlet of the ultrasonic nozzle, the compressor channeling the air sucked into an annular inter-space defined between the lower nozzle and the compressor, and supplying the compressed air with a annular opening, encircling the output of the ultrasonic nozzle, this annular opening having deflectors, illustrated in Figure 6 of the document, ensuring a rotation of the flow.
- such a device consumes a power of 1000 to 1200 Watts, just for its compressor: it is a device suitable for outdoor spraying, used in the field of agriculture in particular, but unsuited to disinfection by air premises.
- the device of document FR 2 285 930 comprising: an ultrasonic head comprising a piezoelectric transducer, and a conical sonotrode, transmitting the vibrations of the transducer, from the base the sonotrode in contact with the transducer to a spraying plate at the distal end of the sonotrode, the latter including a delivery channel of the spraying liquid to said spraying plate, a pump and a tube of feeding a liquid drawn from a reservoir to the supply channel of the sonotrode,
- a ventilation system creates a flow of entrainment air particles sprayed by the ultrasonic head, this system comprising a nozzle and a fan blowing into the nozzle, the latter channeling the flow of air to an orifice exhaust.
- the ultrasonic head is arranged inside the nozzle, coaxially with the latter, that is to say the axis of the sonotrode coincides with that of the nozzle.
- the spray plate is placed inside the nozzle and the nozzle has a narrowing towards its exhaust orifice forming a narrow annular passage formed between the edge of the orifice and that of the spray plate: this reduced passage section ensures a flow of very high flow velocity, in the immediate vicinity of the spray plate: the desired effect in this device is here to cause all the fog avoiding the formation of nets of liquid on the plate, and as explained in this anteriority.
- the sonotrode is preceded in the nozzle by an inner casing which receives the control electronics of the transducer.
- the ultrasonic head of the devices of documents EP 2,090,187 A1 or EP 2,090,370 A1 is substantially coaxial with the axis of the nozzle. In the same way, it ensures the entrainment of the particles sprayed by the sonotrode plate through a narrowing of the nozzle towards its orifice exhaust, a narrow annular passage being provided between the edge of said orifice and that of the spray plate.
- the section-shrinking devices of these prior art generate strong turbulence which does not make it possible to guarantee good control and stability of the particle size of the fog generated by the ultrasonic head.
- the quality of the fog in particular the quality of its particle size, is essential in the success of the disinfection of a room, this particle size being neither too small nor too big, and of standard deviation as small as possible.
- FR 3,011,623 A1 is a device for treating air to supply the enclosure of a system, including a vehicle interior, but also a room or room of a building.
- the air treatment carried out by the device of the document FR 3 011 623 A1 essentially consists of a cooling of the chamber by adding (very) small drops of liquid, this liquid possibly being water, possibly supplemented with water. a disinfectant intended to clean the enclosure.
- the air treatment device comprises, for this purpose, production means arranged so as to produce, for an enclosure, a stream of air treated by the addition of small drops of liquid by means of a nebulization technique using at least one piezoelectric oscillator coupled to a nebulization chamber, said piezoelectric oscillator being part of a perforated membrane element, supplied with liquid by a pipe, for generating very small drops at an outlet of the element, intended to be mixed with a flow of air to be treated circulating in a conduit.
- the output of the piezoelectric element is located at the outlet of the conduit so that the drops are mixed with the flow of air in the enclosure.
- the piezoelectric element is secured to the ceiling of the passenger compartment and the output of the piezoelectric element is inclined relative to the outlet of the duct, in order to optimally deliver the drops in the air flow downstream of the outlet of the passenger compartment. leads.
- the output of the piezoelectric element opens into the conduit upstream of the outlet of the conduit, preferably in the vicinity of the outlet of the conduit.
- the device described in FR 3,011,623 A1 has the disadvantage that it can not be used for disinfection by air, which requires the use of disinfectants such as hydrogen peroxide, peracetic acid or acetic acid.
- the perforated flexible membrane of the nebulizing device of the document FR 3 011 623 A1 is not adapted to ensure the nebulization of such products, in that it may deteriorate rapidly in contact with the latter.
- the quantities of these products to achieve the disinfection threshold significantly exceed the exposure thresholds for humans.
- the device described in FR 3,011,623 A1 is intended to operate in a vehicle interior in the presence of at least one occupant and is therefore not suitable for disinfection by air.
- DE 22 39 950 A1 is a portable device for atomizing a liquid, in particular cosmetics, products for the extermination of insects or the improvement of the quality of the air.
- such a portable device comprises a housing in which there is a fan driven by a motor.
- a piezoelectric oscillation system is disposed in the air flow generated by the fan, inside the walls of the housing.
- the piezoelectric oscillation system comprises a truncated conical horn, on which is fixed a piezoelectric converter, in the form of a piezoelectric ceramic disc.
- a piezoelectric converter in the form of a piezoelectric ceramic disc.
- the working plate On the smaller section end of the truncated cone is the working plate, on the surface of which a liquid is atomized into a mist of very fine droplets through the ultrasonic oscillations of the system.
- the liquid is sprayed on the surface of the working plate via a spray nozzle, from a tank via a conveyor and through a feed pipe.
- the plate In order to blow the mist, the plate forms a small angle, for example, with respect to the flow of air. Due to the flow a large accumulation of liquid on the surface of the working plate is already largely prevented.
- the device of DE 22 39 950 A1 has the disadvantage that the piezoelectric oscillation system as well as the spray nozzle, which is not integrated in the piezoelectric oscillation system, are completely in the housing in order to cooperate with each other. with the airflow generated by the fan.
- Document US 2010/044460 A1 discloses a fluid atomizer for diffusing a liquid in the form of microdroplets by means of piezoelectric means, used in particular for disinfecting or humidifying the air.
- the atomizer comprises a transducer body (piezoelectric) stainless steel, an internal cavity containing the liquid.
- a piezoelectric ceramic material washer is provided, connected to an electrode for supplying electricity to the piezoelectric material which will vibrate a pierced membrane to obtain microdroplets.
- this document also describes an inhaler for administering drugs to the lungs of a patient.
- Such an inhaler includes an adapter for the mouth associated with a T-shaped module, in which is incorporated the atomizer described above.
- the atomizer When the atomizer is running, it generates an aerosol inside the module and the patient inhales the aerosol via the adapter for the mouth.
- Such a device has several disadvantages. Indeed, the use of a membrane for atomizing the liquid does not make it possible to use the device of document US 2010/0044460 A1 for making the DVA of premises or compartments of vehicles, in that the products Employees performing the DVA, in amounts effective to disinfect large spaces such as spaces or vehicle interiors, could damage the membrane quickly.
- the atomizer is placed substantially in the middle of the inhaler, at a distance from the outlet, materialized by the adapter for the mouth.
- drops of liquid may be deposited on the walls of the inhaler between the atomizer and the outlet, which will generate a recycling of the product during the use of the inhaler and thus alter the product, but also affect the control of the flow rate and the particle size of the atomized liquid at the outlet of the inhaler.
- a spraying device for making fine coatings on food or on food packaging, intended for use in the food industry, therefore unsuitable for the DVA, in particular premises or of compartments of vehicles.
- Such a device may for example be used to spray an anti-microbial or anti-enzymatic browning solution to serve as a coating.
- the spraying device comprises an ultrasonic nozzle connected to a liquid supply, itself connected to a reservoir.
- the ultrasound nozzle has a front horn configured to function as an atomizing section.
- the front horn is configured to form liquid drops introduced into the ultrasound nozzle.
- the ultrasound nozzle also includes a transducer portion that includes a pair of transducers positioned in an intermediate section of the ultrasound nozzle. These are piezoelectric transducers configured to transmit the ultrasonic frequency mechanical motion to the front horn allowing the atomization surface disposed on the horn before vibrating at an ultrasonic frequency with sufficient amplitude to atomize the liquid.
- a spraying device comprises a flat air jet deflector tip positioned adjacent to an atomizing surface of a spout. ultrasound, both being arranged on a set of jets block. An air supply connection and a liquid supply connection are also provided on the jet block assembly.
- an air source is attached to the air supply connection and a liquid to be atomized is connected to the liquid supply connection.
- the air flow of the air supply fitting is passed through the air jet baffle tip to give it a flattened shape.
- the flattened air is deflected by the atomization surface of the ultrasonic nozzle.
- the liquid having entered through the liquid supply connection is atomized by the ultrasonic nozzle and is ejected at the atomizing surface.
- the atomized liquid is entrained in the flattened airflow producing a swirling pattern which is composed of air and atomized liquid.
- the object of the present invention is to overcome the aforementioned drawbacks by proposing a nebulizing device suitable for the generation of a disinfecting mist whose quality of the particle size makes it possible to obtain good disinfection performance, a controlled cost price, no requiring no air compressor for its implementation, low energy consumption.
- the purpose of the present invention is to provide such a nebulizing device allowing precise control of the flow rate of the sprayed disinfectant mist.
- Another object of the present invention is to provide such a spraying device ensuring a spray, preferably without recycling product, and thus without risk of altering the disinfectant.
- Another object of the present invention is to provide such an increased safety spray device, avoiding the risk of product spillage in case of overturning of the device.
- Another object of the present invention is to provide such a compact and lightweight portable device.
- Another object of the present invention is to provide a method for airborne disinfection implemented by means of a nebulizing device.
- the invention relates to a nebulizing device for disinfection by air, comprising: an ultrasonic head comprising a transducer and a sonotrode configured to transmit the vibrations from the transducer to a particle ejection surface, the sonotrode comprising a delivery channel for the product to be sprayed to the ejection surface, an air-flow system configured to create a drive air flow of the particles sprayed by the ultrasonic head, comprising a nozzle channeling the airflow to an air outlet.
- the ultrasonic head is arranged at the outlet so as to position the ejection surface and a portion of the length of the sonotrode from said ejection surface while a part of the body of the ultrasonic head protrudes radially outwardly beyond the diameter of the outlet orifice of the nozzle and so as not to be subjected to said entrainment air flow.
- the ultrasonic head having a casing, in particular a cylindrical casing, covering the transducer, or even a control electronics of the piezoelectric transducer, as well as a proximal portion of the sonotrode, a distal portion of the sonotrode carrying the ejection surface extending axially beyond the housing and wherein the ultrasonic head is arranged to position in the drive flow only the ejection surface and the distal portion of the sonotrode and so that the housing is positioned externally protruding beyond the diameter of the outlet orifice to not be subjected to said drive air flow;
- the sonotrode having a body of revolution terminated by a plate forming said ejection surface, the axis of the sonotrode defining the axis of the ultrasonic head, the axis of the ultrasonic head being arranged substantially perpendicular to the axis of the nozzle, the ejection surface substantially parallel to the axis of the nozzle;
- the portion of the ultrasonic head subjected to the driving flow is positioned downstream of the outlet orifice of the nozzle, according to the direction of flow of the air flow; the part of the ultrasonic head subjected to the drive flow is positioned in the immediate vicinity of the outlet orifice of the nozzle;
- the nozzle is of constant section length, at least at the nozzle outlet, or over its entire height;
- the nozzle consists essentially of a cylindrical body whose base at the lower mouth is an inlet for the nozzle, and the base at the upper mouth said air outlet;
- said air-flow system comprises an electrical ventilation means arranged in the lower part of the nozzle;
- - Said electrical ventilation means is a fan positioned in the lower part of the nozzle whose axis of rotation of the helix is substantially coaxial with the axis of the nozzle;
- a blading system is arranged between said air outlet and the electrical ventilation means, configured to straighten the flow generated by said electrical ventilation means;
- a peristaltic pump is configured to route the product to be sprayed to the supply channel of the ultrasonic head;
- the device is portable and has a bearing surface for positioning the air outlet of the nozzle upwards, when placed on a horizontal surface;
- the axis of the nozzle is substantially vertical, or in a direction inclined with respect to the vertical angle ⁇ comprised between 0 ° and 60 °, such as for example 45 ° when the bearing surface rests on the horizontal surface;
- the device comprises a housing internally receiving a control electronics, said lower surface of said housing constituting said support surface, said ventilation system being arranged integral with the housing, positioned cantilevered with respect to the bearing surface of the housing, in order to position said lower air inlet of the ventilation system at a distance ⁇ from the horizontal surface.
- the invention also relates to a method for aerial disinfection implemented by means of a nebulization device according to the invention, in which:
- a flow disinfecting mist is generated, determined by the action of the ejection surface of the ultrasonic head, by supplying the supply channel with disinfectant product according to the determined flow rate,
- the disinfectant flow mist is determined in the air flow generated at the exit of the nozzle.
- the determined flow rate of disinfectant product is between 5 ml / min and 30 ml / min;
- the flow rate of the driving air flow is between 1 m 3 / min and 8 m 3 / min;
- the ultrasonic head is piloted so as to obtain an average particle size of the fog of between 35 micrometers and 55 micrometers;
- the duration of the disinfection is between 45 minutes and 180 minutes; the volume of the room to be disinfected is between 5 m 3 and 250 m 3;
- the disinfecting product is chosen from (or include) the following products, if appropriate in a mixture:
- the invention further relates to the use of the nebulizing device of the invention for the disinfection by air premises.
- the invention also relates to the process according to the invention for the disinfection by air of premises.
- the invention will be better understood on reading the following description accompanied by the appended figures, among which:
- FIG. 1 is a perspective view of a nebulization device according to the invention according to one embodiment
- FIG. 2 is a sectional view of the device of FIG. 1, in a vertical plane passing through the axis of the nozzle,
- FIG. 3 is a perspective view of a device according to a second embodiment
- FIG. 4 is a view from above of the device of FIG. 3,
- FIG. 5 is a sectional view of the device of FIG. 3, in a vertical plane passing through the nozzle,
- FIG. 6 is a modeling of a digital fluid mechanics software simulating the annular flow obtained thanks to a narrowing of the nozzle towards an exhaust orifice, a narrow annular passage being formed between the edge of said orifice and an obstacle coaxial with the nozzle, this modeling highlighting significant turbulence out of nozzle.
- the invention relates firstly to a nebulizing device for disinfection by air, comprising:
- an ultrasonic head 1 comprising a transducer 2 and a sonotrode 3 configured to transmit the vibrations from the transducer 2 to a particle ejection surface 30, the sonotrode 3 comprising a delivery channel 31 of the product to be sprayed towards the surface of the ejection 30,
- a ventilation system 4 configured to create a drive air flow of the particles sprayed by the ultrasonic head, comprising a nozzle 5 channeling the air flow to an air outlet S.
- FIG. 6 is a modeling of a fluid mechanics software simulating such an annular flow obtained by means of a narrowing of the nozzle towards an exhaust orifice, a narrow annular passage. being formed between the edge of said orifice and an obstacle coaxial with the nozzle.
- This modeling is intended to illustrate the movements of the air flow downstream of the exhaust orifice (in the direction of flow) as they will be observed in the devices of the state of the art known from the documents FR 2 285 930, EP 2 090 187 A1 or EP 2 090 370 A1 when the latter drives the particles sprayed: the obstacle coaxial with the nozzle here represents the ultrasonic head of these anteriorities.
- the modeling shows the presence of significant turbulence, and in particular the presence of vortices visible in Figure 6.
- the invention arose from the inventor's desire to reduce these turbulences substantially, and in order to avoid altering as much as possible the particle size of the fog generated by the ejection surface 30 of the ultrasonic head 1
- the invention thus relates to a new arrangement between the ultrasonic head and the nozzle intended to minimize turbulence in the drive flow downstream of the spray surface.
- the ultrasonic head 1 is arranged at the outlet of air S so as to position the ejection surface 30 and a portion of the length of the sonotrode 3 of said ejection surface 30 extending internally to the diameter of the nozzle outlet, while a portion of the body of the ultrasonic head protrudes radially outwardly beyond the diameter of the nozzle 5 and so as not to be subjected to said entrainment air flow.
- the section of the drive flow in the direction orthogonal to the flow may be substantially a disc.
- the transducer 2 may consist of one or more piezoceramic slats, and are connected to a control electronics.
- the sonotrode 3 may have a body of revolution terminated by a plate forming said ejection surface 30, substantially perpendicular to the ejection surface 30.
- the body of the ultrasonic head 1 may further comprise a housing 10, in particular cylindrical covering the transducer 2, or an electronic control of the piezoelectric transducer, as well as a proximal portion of the sonotrode 3, the distal portion of the sonotrode carrying the ejection surface, extending axially beyond the housing 10, in particular axially to cylindrical housing. Note that the advantageous arrangement of the ultrasonic head 1 with respect to the nozzle 5 makes it possible to position at least in part (see FIG. 2), or even totally (see FIG. 5), the casing 10 projecting radially beyond the diameter of FIG.
- the housing 10 protrudes outwardly beyond the diameter of the outlet orifice of the nozzle and so as not to be subjected to said drive air flow.
- the ejection surface 30 and the distal portion of the sonotrode 3, of smaller diameter are positioned in the drive flow only and as illustrated by way of example in FIG. 5.
- the part of the ultrasonic head subjected to the driving flow is positioned at the outlet S of the nozzle 5: this prevents the spray particles contained in the entrainment air stream from being deposited.
- the part of the ultrasonic head 1 subjected to the drive flow can be positioned downstream of the outlet orifice of the nozzle 5, in the direction of flow of the air flow: it is thus ensured that the pulverized particles contained in the entrainment air flow do not settle on the internal walls of the nozzle 5, and so that the entire fog flow rate generated is drawn into the atmosphere of the room to be disinfected. It should however be noted that this objective can always be reasonably achieved by positioning this part very slightly inside the nozzle 5. According to one embodiment, the part of the ultrasonic head subjected to the drive flow can be positioned at immediate proximity of the outlet orifice of the nozzle 5.
- the sonotrode 3 may have a body of revolution terminated by a plate forming said ejection surface 30, the axis of the sonotrode defining the axis of the ultrasonic head. It is also noted that the axis of the ultrasonic head 1 can be arranged substantially perpendicular to the axis of the nozzle 5. The ejection surface 30 is thus positioned substantially parallel to the axis of the nozzle 5 and to the direction of the nozzle. drive flow generated by this nozzle.
- the sonotrode is conventionally a metal body and therefore does not deteriorate in contact with the products used for disinfection by air.
- the ventilation system 4 is configured to create a drive air flow, according to a laminar flow, that is to say non-turbulent.
- the nozzle 5 is preferably of constant section length, at least at the nozzle outlet: the nozzle 5 can be of constant section over its entire height.
- the nozzle 5 consists essentially of a cylindrical body whose base at the lower mouth constitutes an inlet for the nozzle, and the base at the upper mouth said air outflow S.
- the speed of the drive airflow just upstream of the outlet of the nozzle may be between 1 m / s and 10 m / s in the center of the nozzle 5.
- the internal diameter of the cylinder may be between 8 cm and 25 cm.
- the flow rate of the entrainment air flow can be between 1 m 3 / min and 8 m 3 / min. Such a flow of air ensures during the disinfection of a room a recycling of the room air.
- the ventilation system may comprise an electrical ventilation means 6 disposed in the lower part of the nozzle 5, whose function is to generate the air flow.
- This means may be a fan positioned in the lower part of the nozzle, the axis of rotation of the helix 60 is substantially coaxial with the axis of the nozzle 5.
- This fan may comprise an outer housing 61, substantially cylindrical, s' extending in extension of the cylinder of the nozzle 5, substantially of the same useful diameter as the nozzle.
- the electric fan may be a fan of moderate power, less than 20 Watts, for example between 13 Watts and 19 Watts.
- the power of the nebulizer device as a whole ie to power the fan, the ultrasonic head and the control electronics) can be less than 100 W.
- a blading system 7 can be arranged between said air outlet S and the electrical ventilation means 6, configured to straighten the flow generated by said electrical ventilation means 6.
- the blades 70 of the system 7 extend respectively in radial directions to the nozzle. Their curved blade profile 70 makes it possible to straighten the swirling flow generated by the rotor of the electric fan in a straight laminar flow. It is further noted that this blading system 7 is preferably the only obstacle traversed by the air flow in the nozzle 5.
- the device is preferably in the form of a portable device which may advantageously be of moderate weight less than 10 kg, or even less than 6 kg. It comprises a bearing surface 8 for positioning the air outlet S of the nozzle 5 upwards, when placed on a horizontal surface.
- the axis of the nozzle 5 may be inclined relative to the vertical at an angle ⁇ between 0 ° and 60 °, such as for example 45 °.
- ⁇ between 0 ° and 60 °, such as for example 45 °.
- the axis of the nozzle may be substantially vertical, and as shown in Figure 5.
- the air flow causing the particles sprayed is directed upwards, either vertically or inclined relative to the vertical of the same angle as the axis of the nozzle.
- the spray surface 31 is preferably substantially vertical and as illustrated in FIG. 5.
- the spray surface 31 is preferably directed downwards, and as illustrated in FIG. .
- the device may comprise a housing 9 internally receiving a control electronics, said lower surface of said housing 9 constituting said support surface 8.
- Said a somehowlic system 4 may be arranged integral with the housing, positioned cantilevered with respect to the surface of the housing. support 8 of the housing 9, and so as to position said lower air inlet E of the ventilation system 4 at a distance ⁇ from the horizontal surface.
- a user interface 90 may be provided in particular on the upper surface of the housing.
- An open compartment 91 may be secured to the housing, laterally, and intended to receive a reservoir such as a container of disinfectant solution.
- a pump of the peristaltic type is configured to convey the product to be sprayed to the supply channel 31 of the ultrasonic head 1: this pump makes it possible to control the flow rate of the product sprayed by the ultrasonic head 1.
- the invention further relates to a method for aerial disinfection implemented by means of a nebulizing device according to the invention and wherein:
- a flow disinfectant mist is generated, determined by the action of the ejection surface 30 of the ultrasonic head 1, by supplying the supply channel with disinfectant product at the determined flow rate; the disinfectant flow mist determined in FIG. an air flow generated at the outlet of the nozzle 5.
- this nozzle comprises a transducer 2 of the piezoelectric type which is driven at a frequency close to its resonance frequency of the sonotrode.
- the liquid product to be sprayed is channeled (continuously) into the feed duct which opens onto the spray surface 30.
- the frequency can be determined between 50 kHz and 100 kHz in order to obtain a particle size of the medium-diameter mist. between 35 micrometers and 55 micrometers, namely a granulometry giving satisfaction in terms of disinfection performance.
- the flow rate of the sprayed product is controlled by the use of a pump (peristaltic) which supplies the ultrasonic nozzle according to the determined flow rate.
- this peristaltic pump and the ultrasonic nozzle 3 in itself allows to obtain a mist whose distribution of the particle size and the flow rate are determined according to the characteristics of the desired disinfection.
- This fog is then entrained in the room to be treated by the flow of entrainment air generated by the ventilation system 4 which also ensures a mixing of the air of the room to be disinfected.
- the nebulizing device is designed in such a way as not to deteriorate the quality of the fog generated by the ultrasonic nozzle, nor even to reduce the quantity of product delivered into the room, in particular by virtue of the particular positioning of the ultrasonic nozzle 1 by relative to the nozzle 5, or by the choice of a straight nozzle section, constant over the height of the nozzle.
- the determined flow of disinfectant product can be between 5 ml / min and 30 ml / min
- the flow rate of the driving air flow can be between 1 m 3 / min and 8 m 3 / min
- the duration of the disinfection is between 45 minutes and 180 minutes.
- the nebulizing device may optionally have a clock to determine the duration of the disinfection and a circuit automatically interrupting the spray after this period.
- the disinfectant product may be chosen from the following products, or comprise the following products, if appropriate in a mixture: - hydrogen peroxide,
- the nebulizing device and the disinfection method according to the invention find an application for the disinfection of premises, in particular from 5 m 3 to 250 m 3 , or even vehicle compartments.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL17748528T PL3481442T3 (pl) | 2016-07-11 | 2017-07-10 | Urządzenie do nebulizacji produktu ciekłego, sposób dezynfekcji drogą powietrzną i użycie tego urządzenia do dezynfekcji drogą powietrzną |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1656637A FR3053610B1 (fr) | 2016-07-11 | 2016-07-11 | Dispositif de nebulisation d'un produit liquide |
PCT/FR2017/051882 WO2018011501A1 (fr) | 2016-07-11 | 2017-07-10 | Dispositif de nébulisation d'un produit liquide |
Publications (2)
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EP3481442A1 true EP3481442A1 (fr) | 2019-05-15 |
EP3481442B1 EP3481442B1 (fr) | 2020-08-19 |
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EP17748528.1A Active EP3481442B1 (fr) | 2016-07-11 | 2017-07-10 | Dispositif de nebulisation d'un produit liquide, procédé pour la desinfection par voie aerienne et utilisation de ce dispositif pour la désinfection par voie aérienne |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3481442B1 (fr) |
ES (1) | ES2832800T3 (fr) |
FR (1) | FR3053610B1 (fr) |
PL (1) | PL3481442T3 (fr) |
TW (1) | TWI790205B (fr) |
WO (1) | WO2018011501A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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FR3108862B1 (fr) | 2020-04-07 | 2022-08-26 | Octopus Robots | Dispositif de projections de particules désinfectantes dans l’air |
WO2022123248A1 (fr) * | 2020-12-09 | 2022-06-16 | Vapourtec Limited | Pulvérisateurs et procédés de désinfection |
DE102022123498A1 (de) | 2021-09-15 | 2023-03-16 | newtec Umwelttechnik GmbH | Desinfektion von Innenräumen |
WO2024047386A1 (fr) * | 2022-09-03 | 2024-03-07 | Baltic Freya, Uab | Générateur d'aérosol agricole non colmatable pour l'agriculture en environnement contrôlé et en champ |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2239950C3 (de) * | 1972-08-14 | 1979-05-23 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Handgerät zur Flüssigkeitszerstäubung |
DE2445791C2 (de) | 1974-09-25 | 1984-04-19 | Siemens AG, 1000 Berlin und 8000 München | Ultraschall-Flüssigkeitszerstäuber |
FR2655279B1 (fr) | 1989-12-01 | 1993-09-17 | Anios Lab Sarl | Procede de micro-pulverisation d'une solution par ultra son et diffuseur de micro-gouttelettes mettant en óoeuvre le dit dispositif. |
DE9111204U1 (fr) * | 1991-09-10 | 1991-11-07 | Stahl, Werner, 7770 Ueberlingen, De | |
JP4037918B2 (ja) * | 1995-03-20 | 2008-01-23 | フマキラー株式会社 | 薬液噴霧装置 |
FR2908329B1 (fr) * | 2006-11-14 | 2011-01-07 | Telemaq | Dispositif et methode de distribution de fluide par ultrasons |
FR2927237B1 (fr) | 2008-02-13 | 2011-12-23 | Oreal | Dispositif de pulverisation d'un produit cosmetique avec soufflage d'air chaud ou froid |
FR2927240B1 (fr) | 2008-02-13 | 2011-11-11 | Oreal | Tete de pulverisation comportant une sonotrode, parcourue par un canal d'amenee du produit |
US9272297B2 (en) * | 2008-03-04 | 2016-03-01 | Sono-Tek Corporation | Ultrasonic atomizing nozzle methods for the food industry |
FR2941378A1 (fr) | 2009-01-23 | 2010-07-30 | Gloster Europe | Appareil de decontamination par brumisation |
FR2972357B1 (fr) | 2011-03-11 | 2013-07-19 | Anios Lab Sarl | Procede et dispositif pour la desinfection par voie aerienne |
TWI573567B (zh) * | 2012-08-30 | 2017-03-11 | 財團法人工業技術研究院 | 臭氧消毒用手持裝置、方法、罩蓋、臭氧濃度感測模組及方法 |
FR3011623B1 (fr) * | 2013-10-09 | 2018-02-02 | Psa Automobiles Sa. | Dispositif de traitement d'air pour delivrer de l'air avec des petites gouttes de liquide et eclaire en fonction d'au moins une information d'un systeme |
EP3164279B1 (fr) * | 2014-07-04 | 2020-09-02 | PSA Automobiles SA | Dispositif de traitement d'air à élément(s) piézo-électrique(s) à membrane perforée, pour délivrer de l'air avec des petites gouttes de liquide |
WO2016096818A1 (fr) * | 2014-12-18 | 2016-06-23 | SIEFER, Stephan | Désinfectant contenant du peroxyde d'hydrogène et un tensioactif végétal, et procédé d'aseptisation |
-
2016
- 2016-07-11 FR FR1656637A patent/FR3053610B1/fr active Active
-
2017
- 2017-07-10 EP EP17748528.1A patent/EP3481442B1/fr active Active
- 2017-07-10 WO PCT/FR2017/051882 patent/WO2018011501A1/fr unknown
- 2017-07-10 PL PL17748528T patent/PL3481442T3/pl unknown
- 2017-07-10 ES ES17748528T patent/ES2832800T3/es active Active
- 2017-07-11 TW TW106123134A patent/TWI790205B/zh active
Also Published As
Publication number | Publication date |
---|---|
TW201801754A (zh) | 2018-01-16 |
PL3481442T3 (pl) | 2021-01-25 |
TWI790205B (zh) | 2023-01-21 |
FR3053610B1 (fr) | 2020-12-18 |
WO2018011501A1 (fr) | 2018-01-18 |
FR3053610A1 (fr) | 2018-01-12 |
ES2832800T3 (es) | 2021-06-11 |
EP3481442B1 (fr) | 2020-08-19 |
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